碘是108种元素中一种很重要且很有用途的元素。如果人体内缺乏碘,就会患“大脖子病”——甲状腺肿大症。碘溶于酒精可制成碘酒,用来杀菌消毒。碘钨化合物制成的碘钨灯泡体积小、光色好、寿命长,用在电影拍摄、舞台照明中效果尤佳。但你可曾知道,这种地球上含量很少的元素是怎样被发现的 Iodine is one of 108 elements that is very important and very useful element. If there is a lack of iodine in the body, you will suffer from “big neck disease” - goiter. Iodine dissolved in alcohol can be made of iodine for sterilization. Iodine tungsten bulbs made of iodine-tungsten compounds are small in size, good in light color and long in service life, and are especially effective in filming and stage lighting. But you have wondered how this very small element of the earth was discovered